Titanocene Pnictinidene Complexes

The phospha-Wittig reagent ^MesTerPPMe₃ (^MesTer = 2,6-{2,4,6-Me₃-C₆H₂}-C₆H₃) and arsa-Wittig reagent ^DipTerAsPMe₃ (^DipTer = 2,6-{2,6-<i>i</i>Pr₂-C₆H₃}-C₆H₃) have been employed to synthesize the titanocene complexes Cp₂Ti(PMe₃)PnAr (Pn = P, As) with terminal phosphinidene or arsinidene ligands, respectively. <a><i>Ab initio</i> studies show that the description as singlet biradicaloids in their ground state is warranted.</a><br>

Titanocene Pnictinidene Complexes

The phospha-Wittig reagent ^MesTerPPMe₃ (^MesTer = 2,6-{2,4,6-Me₃-C₆H₂}-C₆H₃) and arsa-Wittig reagent ^DipTerAsPMe₃ (^DipTer = 2,6-{2,6-<i>i</i>Pr₂-C₆H₃}-C₆H₃) have been employed to synthesize the titanocene complexes Cp₂Ti(PMe₃)PnAr (Pn = P, As) with terminal phosphinidene or arsinidene ligands, respectively. <a><i>Ab initio</i> studies show that the description as singlet biradicaloids in their ground state is warranted.</a><br>

Titanocene Pnictinidene Complexes

The phospha-Wittig reagent MesTerPPMe3 (MesTer = 2,6-{2,4,6-Me3-C6H2}-C6H3) and arsa-Wittig reagent DipTerAsPMe3 (DipTer = 2,6-{2,6-iPr2-C6H3}-C6H3) have been employed to synthesize the titanocene complexes Cp2Ti(PMe3)PnAr (Pn = P, As) with terminal phosphinidene...

Tổng hợp polymer quang dẫn poly(4-diphenylamino styrene) cho vật liệu quang phi tuyến

The typical synthesis procedure for the monomer of N,N-diphenyl-4-vinylaniline was conducted and has been proved to be ineffective in the university laboratory conditions. The modified procedure was applied successfully using freshly formed Wittig reagent. The monomer was characterized by proton nuclear magnetic resonance (1H NMR) spectroscopy and confirmed the chemical structure with the correct peaks. The photoconductive polymer of poly((4-diphenylamino styrene)) could be obtained only by using the white crystal monomer.

Fluorescent Wittig reagent as a novel ratiometric probe for the quantification of 5-formyluracil and its application in cell imaging

For the first time a Wittig reagent was introduced into the design of a fluorescent probe for the quantification of 5-formyluracil.

Synthesis of Substituted 1,3-Diesters of Glycerol Using Wittig Chemistry

1,3-di-O-Cinnamoyl-glycerol is a natural compound isolated from a Jamaican medicinal plant commonly referred to as Ball moss (Tillandsia recurvata). The synthesis of this compound was achieved via a Wittig chemistry process. The synthetic approach started with acylation of a di-protected glycerol with cinnamoyl chloride, deprotection of the glycerol moiety, reaction of the primary alcohol with bromo acetylbromide followed by treatment with triphenyl phosphine to give the corresponding phosphonium bromide. The phosphonium bromide was then converted in situ to the Wittig reagent which is the basis for a novel route to 1,3-di-O-cinnamoyl glycerol. Four analogs were also synthesized, three of which are new and are being reported in this article for the first time. The new compounds include 3-(3,4-diemthoxy-phenyl)-acrylic acid 2-hydroxy-3-(3-ptolyl-acryloyloxy)-propyl ester (3), 2-acetoxy-5-((E)-3-(3-((E’)-3-(3,4-dimethoxyphenyl)acryloyloxy)-2-hydropropoxy)-3-oxoprop-1-enyl)benzoic acid (4) and 4-((E)-3-(3-((E)-3-(3,4-dimethoxyphenyl)acryloyloxy)-2-hydropropoxy)-3-oxoprop-1-enyl)benzoic acid (5). The compounds showed no activity in our anticancer assay.